998939900 has 72 divisors (see below), whose sum is σ = 2482507776. Its totient is φ = 341784000.

The previous prime is 998939899. The next prime is 998939969. The reversal of 998939900 is 9939899.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 423725 + ... + 426075.

Almost surely, 2^998939900 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 998939900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1241253888).

998939900 is an abundant number, since it is smaller than the sum of its proper divisors (1483567876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

998939900 is a wasteful number, since it uses less digits than its factorization.

998939900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2979 (or 2972 counting only the distinct ones).

The product of its (nonzero) digits is 1417176, while the sum is 56.

The square root of 998939900 is about 31606.0105043329. The cubic root of 998939900 is about 999.6465083917.

The spelling of 998939900 in words is "nine hundred ninety-eight million, nine hundred thirty-nine thousand, nine hundred".